Recently we’ve seen the runaway robot that we’ve lost its control. We almost forget the fact that illustrious interpretation might hide some crucial facts and it might trigger tragedy when we conduct our actions that is only permitted in the realm of unreality. Imagine “collapse of devices that was once regarded as omnipotent” in advance. I consider that our craving for robots derives from vulnerability of our body: in other words, we seek for enduring outer shell to compensate our vulnerability as hermit crabs do.